Reducing RV Window Condensation in Cool, Rainy Weather

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Original Member Title: Window condensation
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An RVer camping in rainy weather with temperatures in the 50s and the interior heated to about 72°F asked how to reduce condensation on windows and at the bottom of the door before traveling farther north. Several members recommended a 120-volt dehumidifier, with one favoring a small rolling unit over tabletop models and another reporting removal of two gallons of water daily from a fifth wheel. A member also recommended using vent fans while showering and cooking to remove moisture at...
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GaryMGg

Senior Member
RV LIFE Pro
Joined
Jul 14, 2025
Posts
557
Location
Treasure Coast Florida
We’re camping in rainy weather with temps in the 50’s.
Thus, we’re inside with the heater running—it’s about 72.
Lots of condensation on the windows and at the bottom of the door.
I expect this makes the inside feel cooler than it is.
We’re not used to the cool or cold—we’re from the land of liquid sunshine and humidity.
Not complaining; it’s just our first trip into this environment and we’re still learning all the secrets and tricks.
What methods are there for getting rid of the condensation other than going back to the heat?
We’re heading farther north and will be for a while.
 
We’re camping in rainy weather with temps in the 50’s.
Thus, we’re inside with the heater running—it’s about 72.
Lots of condensation on the windows and at the bottom of the door.
I expect this makes the inside feel cooler than it is.
We’re not used to the cool or cold—we’re from the land of liquid sunshine and humidity.
Not complaining; it’s just our first trip into this environment and we’re still learning all the secrets and tricks.
What methods are there for getting rid of the condensation other than going back to the heat?
We’re heading farther north and will be for a while.
We bought a dehumidifier.
 
Dehumidifier is you answer. Not the small table top ones, they don't remove enough moisture. Get a small roll around one and it makes it soooooo much more comfortable in the trailer.
How do I know? I live in Oregon and sometimes it rains here.
 
We’re camping in rainy weather with temps in the 50’s.
Thus, we’re inside with the heater running—it’s about 72.
Lots of condensation on the windows and at the bottom of the door.
I expect this makes the inside feel cooler than it is.
We’re not used to the cool or cold—we’re from the land of liquid sunshine and humidity.
Not complaining; it’s just our first trip into this environment and we’re still learning all the secrets and tricks.
What methods are there for getting rid of the condensation other than going back to the heat?
We’re heading farther north and will be for a while.
Get a dehumidifier - it'll make all the difference in the world to your comfort level, especially with the conditions that you're describing. Ours sits in our shower and drains right into our shower basin. We run it continuously, except when we pull it out while we're taking showers. Now I wouldn't think about staying in our RV without one.
 
Open you bathroom vent all the way. Leave it open all day. If the temp is dropping below 45*F at night, then close it.
A tabletop fan pointed up high and towards the bathroom will help circulate the air inside the rv. We have a 12" fan. It runs 24/7/365. We are full-time traveling rv'ers and in Western Oregon.
We don't do the dehumidifier thing. The humidify will go out the vent with a tiny bit of the heat.

KEN
 
120 volt Dehumidifier. Run it in living room.
We get a lot of water too, so that's why we keep it in the shower basin so it can drain there. Before that, the pan would fill up overnight and kick the machine off.
 

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